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gut metabolome

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https://www.readbyqxmd.com/read/28934030/metabolomic-analysis-of-n-acetylcysteine-protection-of-injury-from-gadolinium-dtpa-contrast-agent-in-rats-with-chronic-renal-failure
#1
Chuanling Wan, Rong Xue, Youyang Zhan, Yijie Wu, Xiaojing Li, Fengkui Pei
Gadolinium-based contrast agents (GBCAs) are frequently used to enhance the diagnostic efficacy of magnetic resonance imaging. On the other hand, the association between GBCA administration in patients with advanced renal disease and nephrogenic systemic fibrosis (NSF) was also noted. NSF is a systemic disorder characterized by widespread tissue fibrosis that may lead to death. N-acetylcysteine (NAC) protects rats from injury induced by gadolinium-based contrast agents, but the underlying mechanisms remain unclear...
September 2017: Omics: a Journal of Integrative Biology
https://www.readbyqxmd.com/read/28925102/continued-alcohol-misuse-in-human-cirrhosis-is-associated-with-an-impaired-gut-liver-axis
#2
Jasmohan S Bajaj, Genta Kakiyama, Derrick Zhao, Hajime Takei, Andrew Fagan, Phillip Hylemon, Huiping Zhou, William M Pandak, Hiroshi Nittono, Oliver Fiehn, Nita Salzman, Mary Holtz, Pippa Simpson, Edith A Gavis, Douglas M Heuman, Runping Liu, Dae Joong Kang, Masoumeh Sikaroodi, Patrick M Gillevet
BACKGROUND: Cirrhosis and alcohol can independently affect the gut-liver axis with systemic inflammation. However their concurrent impact in humans is unclear. AIM: Determine the effect of continued alcohol misuse on the gut-liver axis in cirrhotic patients. METHODS: Age and MELD-balanced cirrhotic patients who were currently drinking (Alc) or abstinent (NAlc), and healthy controls underwent serum and stool collection. A subset underwent upper endoscopy and colonoscopy for biopsies and duodenal fluid collection...
September 19, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28923537/metagenomic-shotgun-sequencing-and-unbiased-metabolomic-profiling-identify-specific-human-gut-microbiota-and-metabolites-associated-with-immune-checkpoint-therapy-efficacy-in-melanoma-patients
#3
Arthur E Frankel, Laura A Coughlin, Jiwoong Kim, Thomas W Froehlich, Yang Xie, Eugene P Frenkel, Andrew Y Koh
This is the first prospective study of the effects of human gut microbiota and metabolites on immune checkpoint inhibitor (ICT) response in metastatic melanoma patients. Whereas many melanoma patients exhibit profound response to ICT, there are fewer options for patients failing ICT-particularly with BRAF-wild-type disease. In preclinical studies, specific gut microbiota promotes regression of melanoma in mice. We therefore conducted a study of the effects of pretreatment gut microbiota and metabolites on ICT Response Evaluation Criteria in Solid Tumors response in 39 metastatic melanoma patients treated with ipilimumab, nivolumab, ipilimumab plus nivolumab (IN), or pembrolizumab (P)...
September 14, 2017: Neoplasia: An International Journal for Oncology Research
https://www.readbyqxmd.com/read/28916042/urinary-intermediates-of-tryptophan-as-indicators-of-the-gut-microbial-metabolism
#4
Tereza Pavlova, Veronika Vidova, Julie Bienertova-Vasku, Petr Janku, Martina Almasi, Jana Klanova, Zdenek Spacil
While over 10% of the human metabolome is directly associated with the gut microbial metabolism, specific metabolites are largely uncharacterized. Therefore, methods for the identification and quantification of microbiota-associated metabolites in biological fluids such as urine or plasma are necessary in order to elucidate the molecular basis of host-microbiota interaction. In this study, we focused on the tryptophan metabolism, employing quantitative assays by ultra-high performance liquid chromatography (UHPLC) and tandem mass spectrometry, specifically selected reaction monitoring (SRM)...
September 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28915922/recent-urbanization-in-china-is-correlated-with-a-westernized-microbiome-encoding-increased-virulence-and-antibiotic-resistance-genes
#5
Kathryn Winglee, Annie Green Howard, Wei Sha, Raad Z Gharaibeh, Jiawu Liu, Donghui Jin, Anthony A Fodor, Penny Gordon-Larsen
BACKGROUND: Urbanization is associated with an increased risk for a number of diseases, including obesity, diabetes, and cancer, which all also show associations with the microbiome. While microbial community composition has been shown to vary across continents and in traditional versus Westernized societies, few studies have examined urban-rural differences in neighboring communities within a single country undergoing rapid urbanization. In this study, we compared the gut microbiome, plasma metabolome, dietary habits, and health biomarkers of rural and urban people from a single Chinese province...
September 15, 2017: Microbiome
https://www.readbyqxmd.com/read/28903954/quantity-and-source-of-dietary-protein-influence-metabolite-production-by-gut-microbiota-and-rectal-mucosa-gene-expression-a-randomized-parallel-double-blind-trial-in-overweight-humans
#6
Martin Beaumont, Kevin Joseph Portune, Nils Steuer, Annaïg Lan, Victor Cerrudo, Marc Audebert, Florent Dumont, Giulia Mancano, Nadezda Khodorova, Mireille Andriamihaja, Gheorghe Airinei, Daniel Tomé, Robert Benamouzig, Anne-Marie Davila, Sandrine Paule Claus, Yolanda Sanz, François Blachier
Background: Although high-protein diets (HPDs) are frequently consumed for body-weight control, little is known about the consequences for gut microbiota composition and metabolic activity and for large intestine mucosal homeostasis. Moreover, the effects of HPDs according to the source of protein need to be considered in this context.Objective: The objective of this study was to evaluate the effects of the quantity and source of dietary protein on microbiota composition, bacterial metabolite production, and consequences for the large intestinal mucosa in humans...
September 13, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28894110/omega-3-fatty-acids-correlate-with-gut-microbiome-diversity-and-production-of-n-carbamylglutamate-in-middle-aged-and-elderly-women
#7
Cristina Menni, Jonas Zierer, Tess Pallister, Matthew A Jackson, Tao Long, Robert P Mohney, Claire J Steves, Tim D Spector, Ana M Valdes
Omega-3 fatty acids may influence human physiological parameters in part by affecting the gut microbiome. The aim of this study was to investigate the links between omega-3 fatty acids, gut microbiome diversity and composition and faecal metabolomic profiles in middle aged and elderly women. We analysed data from 876 twins with 16S microbiome data and DHA, total omega-3, and other circulating fatty acids. Estimated food intake of omega-3 fatty acids were obtained from food frequency questionnaires. Both total omega-3and DHA serum levels were significantly correlated with microbiome alpha diversity (Shannon index) after adjusting for confounders (DHA Beta(SE) = 0...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28888875/imazalil-exposure-induces-gut-microbiota-dysbiosis-and-hepatic-metabolism-disorder-in-zebrafish
#8
Cuiyuan Jin, Ting Luo, Zhihong Zhu, Zihong Pan, Jiajing Yang, Wenchao Wang, Zhengwei Fu, Yuanxiang Jin
The fungicide imazalil (IMZ) is used extensively to preserve freshness, prevent decay and control fungal infections in fruits, vegetables or other plants. Recently, some studies have reported that the real in aquatic systems have reached very high levels. Here, male adult zebrafish were exposed to 100 and 1000μg/L IMZ for 1, 7, 21days, and the gut microbiota and hepatic metabolism were evaluated. Exposure to a high concentration of IMZ for 21days decreased mucin secretion in the gut. Sequencing of the V3-V4 region of the bacterial 16S rRNA gene revealed a significant increase in the diversity of gut microbiota in male zebrafish...
September 6, 2017: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
https://www.readbyqxmd.com/read/28887494/sulfonolipids-as-novel-metabolite-markers-of-alistipes-and-odoribacter-affected-by-high-fat-diets
#9
Alesia Walker, Barbara Pfitzner, Mourad Harir, Monika Schaubeck, Jelena Calasan, Silke S Heinzmann, Dmitrij Turaev, Thomas Rattei, David Endesfelder, Wolfgang Zu Castell, Dirk Haller, Michael Schmid, Anton Hartmann, Philippe Schmitt-Kopplin
The gut microbiota generates a huge pool of unknown metabolites, and their identification and characterization is a key challenge in metabolomics. However, there are still gaps on the studies of gut microbiota and their chemical structures. In this investigation, an unusual class of bacterial sulfonolipids (SLs) is detected in mouse cecum, which was originally found in environmental microbes. We have performed a detailed molecular level characterization of this class of lipids by combining high-resolution mass spectrometry and liquid chromatography analysis...
September 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28878756/analysis-of-microbial-functions-in-the-rhizosphere-using-a-metabolic-network-based-framework-for-metagenomics-interpretation
#10
Shany Ofaim, Maya Ofek-Lalzar, Noa Sela, Jiandong Jinag, Yechezkel Kashi, Dror Minz, Shiri Freilich
Advances in metagenomics enable high resolution description of complex bacterial communities in their natural environments. Consequently, conceptual approaches for community level functional analysis are in high need. Here, we introduce a framework for a metagenomics-based analysis of community functions. Environment-specific gene catalogs, derived from metagenomes, are processed into metabolic-network representation. By applying established ecological conventions, network-edges (metabolic functions) are assigned with taxonomic annotations according to the dominance level of specific groups...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28877893/randomized-controlled-trial-on-the-impact-of-early-life-intervention-with-bifidobacteria-on-the-healthy-infant-fecal-microbiota-and-metabolome
#11
Monika Bazanella, Tanja V Maier, Thomas Clavel, Ilias Lagkouvardos, Marianna Lucio, Maria X Maldonado-Gòmez, Chloe Autran, Jens Walter, Lars Bode, Philippe Schmitt-Kopplin, Dirk Haller
Background: Early-life colonization of the intestinal tract is a dynamic process influenced by numerous factors. The impact of probiotic-supplemented infant formula on the composition and function of the infant gut microbiota is not well defined.Objective: We sought to determine the effects of a bifidobacteria-containing formula on the healthy human intestinal microbiome during the first year of life.Design: A double-blind, randomized, placebo-controlled study of newborn infants assigned to a standard whey-based formula containing a total of 10(8) colony-forming units (CFU)/g of Bifidobacterium bifidum, Bifidobacterium breve, Bifidobacterium longum, B...
September 6, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28871782/antibiotic-treatment-preventing-necrotising-enterocolitis-alters-urinary-and-plasma-metabolomes-in-preterm-pigs
#12
Pingping Jiang, Alessia Trimigno, Jan Stanstrup, Bekzod Khakimov, Nanna Viereck, Søren Balling Engelsen, Per Torp Sangild, Lars Ove Dragsted
Necrotising enterocolitis (NEC) is a serious gut inflammatory condition in premature neonates, onset and development of which depend on the gut microbiome. Attenuation of the gut microbiome by antibiotics can reduce NEC incidence and severity. However, how the antibiotics-suppressed gut microbiome affects the whole-body metabolism in NEC-sensitive premature neonates is unknown. In formula-fed preterm pigs, used as a model for preterm infants, plasma and urinary metabolomes were investigated by LC-MS and (1)H NMR, with and without antibiotic treatment immediately after birth...
September 14, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28870797/detailed-characterisation-of-stc-1-cells-and-the-pgip-neo-sub-clone-suggests-the-incretin-hormones-are-translationally-regulated
#13
Anna L Gillespie, Xiaobei Pan, Anna Marco-Ramell, Caroline Meharg, Brian D Green
STC-1 is a heterogeneous plurihormonal cell line producing several prominent gut peptide hormones. pGIP/Neo is a genetically selected sub-clone of STC-1 with augmented levels of glucose-dependent insulinotropic peptide (GIP). Morphometric parameters, hormone concentrations, mRNA transcripts, hormone immunocytochemistry and nutrient utilisation/production of these two cell lines were compared. Proglucagon-derived peptides (Glucagon-like peptide-1 (GLP-1) and - 2(GLP-2)) were lower in sub-clone cells than progenitor cells...
September 8, 2017: Peptides
https://www.readbyqxmd.com/read/28870126/innovative-biomarkers-in-psychiatric-disorders-a-major-clinical-challenge-in-psychiatry
#14
Madia Lozupone, Davide Seripa, Eleonora Stella, Maddalena La Montagna, Vincenzo Solfrizzi, Nicola Quaranta, Federica Veneziani, Alberto Cester, Rodolfo Sardone, Caterina Bonfiglio, Gianluigi Giannelli, Paola Bisceglia, Roberto Bringiotti, Antonio Daniele, Antonio Greco, Antonello Bellomo, Giancarlo Logroscino, Francesco Panza
Currently, the diagnosis of psychiatric illnesses is based upon DSM-5 criteria. Although endophenotype-specificity for a particular disorder is discussed, the identification of objective biomarkers is ongoing for aiding diagnosis, prognosis, or clinical response to treatment. We need to improve the understanding of the biological abnormalities in psychiatric illnesses across conventional diagnostic boundaries. The present review investigates the innovative post-genomic knowledge used for psychiatric illness diagnostics and treatment response, with a particular focus on proteomics...
September 11, 2017: Expert Review of Proteomics
https://www.readbyqxmd.com/read/28869421/a-systemic-view-on-the-distribution-of-diet-derived-methanol-and-hepatic-acetone-in-mice
#15
Martin Kistler, Andreea Muntean, Vera Hoellriegl, Georg Matuschek, Ralf Zimmermann, Christoph Hoeschen, Martin Hrabe de Angelis, Jan Rozman
Volatile organic compounds (VOCs) from breath can successfully be used to diagnose disease-specific pathological alterations in metabolism. However, the exact origin and underlying biochemical pathways that could be mapped to VOC signatures are mainly unknown. There is a knowledge gap regarding the contribution of tissues, organs, the gut microbiome, and exogenous factors to the "sum signal" from breath samples. Animal models for human disease such as mutant mice provide the possibility to reproduce genetic predisposition to disease, thereby allowing the in-depth analysis of metabolic and biochemical functions...
September 4, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28864748/novel-interactions-between-gut-microbiome-and-host-drug-processing-genes-modify-the-hepatic-metabolism-of-the-environmental-chemicals-pbdes
#16
Cindy Yanfei Li, Soowan Lee, Sara Cade, Li-Jung Kuo, Irvin R Schultz, Deepak K Bhatt, Bhagwat Prasad, Theo K Bammler, Julia Yue Cui
The gut microbiome is a novel frontier in xenobiotic metabolism. Polybrominated diphenyl ethers (PBDEs), especially BDE-47 and BDE-99, are among the most abundant and persistent environmental contaminants that produce a variety of toxicities. Little is known about how the gut microbiome affects the hepatic metabolism of PBDEs and the PBDE-mediated regulation of drug-processing genes (DPGs) in vivo. The goal of this study was to determine the role of gut microbiome in modulating the hepatic biotransformation of PBDEs...
September 1, 2017: Drug Metabolism and Disposition: the Biological Fate of Chemicals
https://www.readbyqxmd.com/read/28861070/environmental-pollutant-benzo-a-pyrene-impacts-the-volatile-metabolome-and-transcriptome-of-the-human-gut-microbiota
#17
Clémence Defois, Jérémy Ratel, Sylvain Denis, Bérénice Batut, Réjane Beugnot, Eric Peyretaillade, Erwan Engel, Pierre Peyret
Benzo[a]pyrene (B[a]P) is a ubiquitous, persistent, and carcinogenic pollutant that belongs to the large family of polycyclic aromatic hydrocarbons. Population exposure primarily occurs via contaminated food products, which introduces the pollutant to the digestive tract. Although the metabolism of B[a]P by host cells is well known, its impacts on the human gut microbiota, which plays a key role in health and disease, remain unexplored. We performed an in vitro assay using 16S barcoding, metatranscriptomics and volatile metabolomics to study the impact of B[a]P on two distinct human fecal microbiota...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28842640/cross-sectional-evaluation-of-the-gut-microbiome-metabolome-axis-in-an-italian-cohort-of-ibd-patients
#18
Maria Laura Santoru, Cristina Piras, Antonio Murgia, Vanessa Palmas, Tania Camboni, Sonia Liggi, Ivan Ibba, Maria Antonia Lai, Sandro Orrù, Anna Lisa Loizedda, Julian Leether Griffin, Paolo Usai, Pierluigi Caboni, Luigi Atzori, Aldo Manzin
Inflammatory bowel disease (IBD) is a chronic inflammatory disease of the gastrointestinal tract of uncertain origin, which includes ulcerative colitis (UC) and Crohn's disease (CD). The composition of gut microbiota may change in IBD affected individuals, but whether dysbiosis is the cause or the consequence of inflammatory processes in the intestinal tissue is still unclear. Here, the composition of the microbiota and the metabolites in stool of 183 subjects (82 UC, 50 CD, and 51 healthy controls) were determined...
August 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821301/space-type-radiation-induces-multimodal-responses-in-the-mouse-gut-microbiome-and-metabolome
#19
David Casero, Kirandeep Gill, Vijayalakshmi Sridharan, Igor Koturbash, Gregory Nelson, Martin Hauer-Jensen, Marjan Boerma, Jonathan Braun, Amrita K Cheema
BACKGROUND: Space travel is associated with continuous low dose rate exposure to high linear energy transfer (LET) radiation. Pathophysiological manifestations after low dose radiation exposure are strongly influenced by non-cytocidal radiation effects, including changes in the microbiome and host gene expression. Although the importance of the gut microbiome in the maintenance of human health is well established, little is known about the role of radiation in altering the microbiome during deep-space travel...
August 18, 2017: Microbiome
https://www.readbyqxmd.com/read/28808723/plasma-metabolite-abundances-are-associated-with-urinary-enterolactone-excretion-in-healthy-participants-on-controlled-diets
#20
Fayth L Miles, Sandi L Navarro, Yvonne Schwarz, Haiwei Gu, Danijel Djukovic, Timothy W Randolph, Ali Shojaie, Mario Kratz, Meredith A J Hullar, Paul D Lampe, Marian L Neuhouser, Daniel Raftery, Johanna W Lampe
Enterolignans, products of gut bacterial metabolism of plant lignans, have been associated with reduced risk of chronic diseases, but their association with other plasma metabolites is unknown. We examined plasma metabolite profiles according to urinary enterolignan excretion in a cross-sectional analysis using data from a randomized crossover, controlled feeding study. Eighty healthy adult males and females completed two 28-day feeding periods differing by glycemic load, refined carbohydrate, and fiber content...
September 20, 2017: Food & Function
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